问题
选择题
The river through our city, which is about ______, is clean again. [ ]
A. 6000 metres long
B. 6000-metres-long
C. 6000-metre-long
D. 6000 metre long
答案
答案：A
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The river through our city, which is about ______, is clean again. [ ]
A. 6000 metres long
B. 6000-metres-long
C. 6000-metre-long
D. 6000 metre long
答案：A